北京典型再生水补水型河道水质变化分析

Change in water quality of typical river refilled with reclaimed water in Beijing

选取清河作为研究对象,开展北京典型再生水补水型河道水质指标变化分析研究。分析了清河安河闸至清河桥之间河段的pH值、溶解氧质量浓度、含氮营养盐质量浓度和含磷营养盐质量浓度的沿程变化。结果表明,再生水回用河道后,pH值会出现逐渐上升现象,含氮营养盐始终处于较高质量浓度,存在水体富营养化的风险,应采取强化修复措施,降低风险,维护再生水河道的水体生态环境稳定。

Qing river was selected as the typical river refilled with reclaimed water in Beijing to carry out the water quality change analysis, pH value, dissolved oxygen concentration, nitrogen nutrient con- centration and phosphorus nutrient concentration were analyzed in the river reach between Anhe sluice and Qinghe bridge. The results showed that after refilling reclaimed water in the river, the pH value gradually rise; and the nitrogen nutrient remained relatively high concentration. The river water had the risk of eutrophication, the remediation measures should be taken to reduce risk as well. These will keep ecological environment of the river refilled with reclaimed water more stable.